9.8

CVE-2026-20156: cisco cisco roomos software

CVSS: 9.8v3.1CriticalUndergoing analysis
Published 15-07-2026Last modified 14-08-2026
Open JSON

Vulnerability summary

CVE-2026-20156 is a critical (CVSS 9.8) vulnerability in cisco cisco roomos software. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.46%
0%100%
Low · +0.20 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-07-2026
    PublishedVulnerability first disclosed.
  2. 14-08-2026
    Last modifiedVulnerability information updated.

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20156 are related to improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.20 pp

From 0.26% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco3 products
  • cisco roomos softwareRoomOS 10.11.2.2 | RoomOS 10.15.2.2 | RoomOS 11.5.4.6 | RoomOS 11.5.2.4 | RoomOS 10.8.2.5 | RoomOS 10.11.5.2 | RoomOS 10.11.3.0 | RoomOS 10.15.5.3 | RoomOS 10.19.2.2 | RoomOS 11.1.3.1 | RoomOS 10.11.6.0 | RoomOS 10.19.3.0 | RoomOS 10.19.4.2 | RoomOS 10.3.2.4 | RoomOS 10.3.4.0 | RoomOS 10.15.3.0 | RoomOS 11.1.4.1 | RoomOS 11.14.2.3 | RoomOS 11.1.2.4 | RoomOS 10.8.3.1 | RoomOS 11.14.2.1 | RoomOS 10.3.3.0 | RoomOS 10.8.4.0 | RoomOS 10.15.4.1 | RoomOS 10.19.5.6 | RoomOS 10.11.4.1 | RoomOS 11.9.3.1 | RoomOS 11.5.3.3 | RoomOS 10.3.2.0 | RoomOS 11.9.2.4 | RoomOS 11.14.3.0 | RoomOS 11.17.2.2 | RoomOS 11.14.4.0 | RoomOS 10.19 StepUpg | RoomOS 11.17.3.0 | RoomOS 11.20.2.3 | RoomOS 11.14.5.0 | RoomOS 11.17.4.0 | RoomOS 11.20.3.0 | RoomOS 11.23.1.6 | RoomOS 11.23.1.8 | RoomOS 11.24.1.5 | RoomOS 11.24.2.4 | RoomOS 11.24.3.0 | RoomOS 11.24.4.1 | RoomOS 11.27.2.0 | RoomOS 11.28.1.3 | RoomOS 11.27.3.0 | RoomOS 11.31.1.5 | RoomOS 11.27.4.0 | RoomOS 11.32.2.1 | RoomOS 11.33.1.7 | RoomOS 26.0.1.2 | RoomOS 11.34.1.2 | RoomOS 11.32.3.0 | RoomOS 11.27.5.0 | RoomOS 11.32.4.0 | RoomOS 26.1.1.5 | RoomOS 11.35.1.2 | RoomOS 26.2.2.2 | RoomOS 11.32.5.1 | RoomOS 26.4.1.6 | RoomOS 26.4.1.4 | RoomOS 26.3.1.3 | RoomOS 11.36.1.1 | RoomOS 11.37.1.0 | RoomOS 26.5.2.0 | RoomOS 11.38.1.1
  • roomos< 11.32.6.0 | ≥ 26.0.1.2, < 26.5.2.2
  • roomos_cloud< 11.39.1.1 | ≥ 26.0.1.2, < 26.7.1.7

1 vendor · 3 products

References

2 links